The Spectroline® OPTI-LUX™ 365 leak detection flashlight provides pure UV light for optimal fluorescent dye response, making it suitable for all industrial fluid system leak applications. The flashlight produces a glow that makes leaks easier to find, slashing valuable diagnostic time. It also works in difficult-to-fluoresce dyes in dirty fluids. “Instant-on” operation enables the flashlight to reach full power immediately, and it provides up to four hours of continuous run time.